public struct Scheduled<T>
Returned once a task was scheduled on the
EventLoop for later execution.
Scheduled allows the user to either
cancel() the execution of the scheduled task (if possible) or obtain a reference to the
will be notified once the execution is complete.
Try to cancel the execution of the scheduled task.
Whether this is successful depends on whether the execution of the task already begun. This means that cancellation is not guaranteed.
@inlinable public func cancel()